Using your profile, you can set which Favorites lists are set to be monitored by default, but that only sets this option when you download your profile & lists to the scanner fro Sentinel. Once you have your information downloaded to the scanner, the scanner will be governed by which lists and/or systems were enabled the last time you power cycled the scanner. Other than dealing with systems, sites, & departments in setting up your list(s), the scanner will simply default back to whichever lists or systems (and departments) were enabled the last time you powered down the scanner. When you turn the scanner back on again, they will be set however their status was (on, off, avoided, etc) when the scanner was powered down.
If you want to be able, selectively, to change which lists, or systems, are enabled, or disabled, when you power the scanner back up, the only way to do that is via the Startup keys. Or, as
brent has noted, quick keys.